Pipe joint



Aug. 23, 1932. J, w, MOORE lpz@ PIPE JOINT Filed OC. 17, 1929 IN VENTOR.

and spigot end Surfaces of t upon t'o prevent endwise separation.

Patented Aug. 23, 1932 uNrrraD STATES PATENT.. oFFlcE .'IJ'AMES W.MOORE, OF BIRMINGHAM, ASSIGNOB TO AMERICAN GAST IRON PIPE COMPANY, OFBIRMINGHAM, ALABAMA, A CORPORATION OF GEORGIA Application led October17, 1929. Serial No. 400,272.

This invention is an improvement in pipe joints', and particularly injoints'of the bell and spigot type, as used in connectingy pipe sectionswhich are usually of cast iron. The

joint in pipes to which the present improvement relates is sealed bycompressible packing, compressed between the b'ell and spigot parts by agland which is tightened against the packing by bolts.

The principal object and advantage of the vinvention is thel provisionofmeans positively preventing separation of the pipe members at thejoint while permitting limited but lsubstantial relative longitudinalmovement of the member to take care of ex ansion and con-v traction orother forces ten ing to move yone of the pipe members in relation to theother, and at the same time maintaining the tightness and sealing effectof the packing.

In the usual construction of pipe joints of the character in questionthef rictlon grip of thev gasket or packing aglainst the socket e .pipes isrelied This arrangement provides a satisfactory seal, but not a positivelock against endwise separation of the pipes longitudinally.

One of the primary objects'of the present invention is the provision ofa'lock for' pipejoints lof this character, wherein there is a positivelocking engagement between the pipes to limit their longitudinalseparating movement with respect to each other, and at the same time topermit slight endwise movement of the pipe members to take careofecontraction and expansion while also maintaining the tightness andsealing'eiect of thepa'cking.- A 4 l v Another object is the provisionof aIsimple relativelypinexpensive locking means 'requiring but slightAchange in the pipes themselves, and enabling the'q'uick and easyassembling or disassembling of the pipe sections. j With these and other'objects in view the invention consists in the construction and novelVcombination "of parts fully described hereinafter, illustrated in theaccompanying y drawing, and pointed out in the claims ap,-

pended hereto, it being understood that various changes inthe form,proportion, size and minor' details of construction within the scope ofthe claims, may be resorted to with'- out departing from the spirit ofthe' invention.

Inthe drawing forming a part hereof:- Fig. 1l is alongitudinal sectionof the improved joint. e v

Fig. 2 is a section on the line 2--2 of Fig. 1. Figs. 3 and 4 aredetails inl section of alternate constructions.

In the embodiment of the invention shown in Figs. 1 and 2, one of thepipe sections 1 hasthe usual bell 2, and the other section 3 has thespigot end adapted to be received within the bell. The bell -has amarginal flange 4, which is provided with openings 5, for receivingbolts 6. A

A collar 7 is loosely placed 4about the section 3, and this collar hasopenings 8 correand are engaged by nuts 9, whereby the col-g lar may bedrawn toward the iiange.

The packing includes a ring or'gasket 10 of suitable compressingmaterial, arran between the spigot end of the bell. The outer end of thespigot, is counter bored, reamed or cast enlarged, as shown at 11 and14, to provide portions of unequaldiameter, and an annular shoulderv 12atthe inner end of the slightly enlarged cylindrical portion 11. Betweenthe portions of unequal diameter the. reamed portion 4is inclined asshown at 13, and the outer face of the packing ring issimilarly'inclined to cooperate therewith, to provide a' wedging actionwhen the packing is drawn toward the bell. A

' vRings 15 and 16 are arranged on opposite sides of thepacking orgaskets, the saidrings being sectional, each `consisting of similarsections, and each section is substantially a tinuous circular f ormcould not be passed -over the spigot end enlargement such as 19 or 24.As shown in Fig. 1, the ring 15 abuts the packing, and the said otherend is counterbored or reamed as shown at 17, to fit the end of thepacking, and a part of the inclined outer face thereof, the slant orconical face 17 of the ring 15 forms ine'lfect a continuation of thesimilar surface 13 provided in the bell for contraction or compressionof the packing against the spigot surface when compressed by tighteningthe bolts, whereby ringor ,collar 7 acts on the ring 16 to compress thepacking, the inward end portion of which then abuts against the shoulderof ring 15 located in a vertical plane at the inward end of the conicalsurface 17. The inner end face of the ring 16 may be beveled or conical.as shown. to increase the effectiveness of compression of the packing.The-outer end of the ring 16 engages in a ream or counterbore 18, in theinner face of the collar 7, to locate and center the collar, whose boreis of a size to pass over the enlargement of the spigot end, and also toretain the two halves of the ring 16 in position after they are locatedabout the spigot portion 3.

The positive lock against separation of the pipe sections is providedfor by an external annular bead',lor conical enlargement 19, on thespigot end of the pipe section 3.. This portion 3 and also between thepacking and' the ring 7 having previously been slipped over the spigotend of the pipe section 3. It will be noted, referring to Fig. 1, thatthe internal diameter of the rin greater than the external iameter ofthe largest portion of the bead 19, to permit placement of this ringover the enlarged pipe en After the parts are assembled as described,the bolts are engaged with the nuts 9, and the nuts are turned to d rawthe collar toward the flange 4. Thusvthe packing 10 is compressedbetween the rings 15 and 16, axially of the pipe, and because of thecooperating inclined -surfaces it expands radially of the sections.

bead has an outer surface which flares from the surface of the section3, and the internal surface of the ring 15 is shaped to correspond. Itwill be apparent that should the pipe section 3 be pulled away from thesection 1, the

surface 19 of the bead will engage the internaly surface of the ring 15,to positively prevent further separation. Thus the packing of the gasketand associated parts cooper- L ates with the bead to provide a positivelock.

At the same time location or spacing of the enlargement such as 19 or 24in relation to the inwardly located ring 15 or stop ring is such as topermit substantial inward and outward movement of the spigot portion orpipe section 3, in relation to the bell or pipe section 1, under theinfluence of temperature changes, mechanical forces, etc., which withoutthis joint slippage would tend to cause buckling or other disturbancesor breakage in the pipe line; and during any such movements of themember 3 in relation to the other pipe member its cylindrical portion,

slides within the packing 1() and tightness of the packing and of theseal is maintained at all times. The conical packing-compressing seal ismaintained at the surface of the spigot f and spigot type, comprising aHaring abut-f In Fig. 3, the joint indicated generally at` 20, is of thesame character as that shown in Fig. 1, as is also the bell' 21 of thepipe section 22. The other pipe section 23 has an external marginal rib24, which acts in the same manner as the bead 19 in preventingseparation of the sections, and the confronting face of ring 15 may insuch case be made in the form of a squared shoulder to encounter thesquared or radial face 24 of the bead. It will be apparent that this ribor bead 24 might be replaced by lugs or projections of any character, asfor instance, the screws shown and described in my copending appli,-cation Serial No. with.

In Fig. 4, the pipe section 25 corresponding to section 1 ofFig. 1, hasthe Vbell 26, while the end of the section 27 is the same as the end ofthe section 3. The packing indicated generally at 28, is precisely thesame 7 is somewhat 400,271, of even date herel as that shown in Fig. 1.Instead of proflange 29. The construction is otherwise the., same asthatshown in Fig. 1, and operates in' the same manner.

What is claimed as new is 1. joint for sections of pipe of the bell menton the interior of the bell section adjacent its end, a counterboreterminating forwardly at the inner end of the flaring abutment, a ringmounted in the counterbore around the spigot section, said ring having aflared face in substantially the same plane as said flaring abutment, acompressible packing between the outer surface ofthe spigot section andsaid flaring abutment on the bell section and flared face on the packingring, a second counterbore located rearwardly of bore, a portion of thepacking ring bein disposed in front of said second counter ore, and anenlarged end on the spigot section located in said second counterbore.

2. The structure of claim l vwherein the portion of the packing ringdisposed in front of said second counterbore has a tapered surface andthe enlarged end of the spigot section is tapered in substantially thesame plane 'as the tapered surface on the packing ring.

3. A joint for sections of vv'pipe of the bell and spigot type, the bellsection having a tapering abutment formed adjacent its end, a

counterbore terminating forwardly at the inner end of the taperingabutment, a ring mounted in said counterbore around the spigot section,the inner end of the ring abutting the shoulder of the counter-bore andthe outer end of the ring being formed with a tapered surfacesubstantially aligned with said tapered abutment on the bell section, ashoulder on the ring at the inner end of said tapered surface, aIcompressible packing engaging the tapering abutment on the bell sectionand the tapered surface and the shoulder on said ring, and meansfor-holding said packing in said position.

Signed at Birmingham, in the county of Jefferson and State of Alabama,this 5th day of October, A. D. 1929.

JAMES W. MOORE.

